Sewing machine loop shaper attachment



Feb. 14, 1956 A. GELLMAN ETAL 2,734,670

SEWING MACHINE LOOP SHAPER ATTACHMENT Filed Nov. 16, 1951 2 Sheets-Sheetl Asian/MM GELLMHN SIDNEY DIESEIV HA us INVENTORJ' Feb. 14, 1956 A.GELLMAN ETAL 2,734,670

SEWING MACHINE Loop SHAPE-R ATTACHMENT 2 Sheets-Sheet 2 Filed Nov. 16,1951 06/24 110m GELLMA/Y SIDNEY D/EsErw/Aw;

United States Patent f 2,734,570 Loor' SHAPER Abraham Gunman, New ar,and Sidney Diesenh'aus,

Monsey, N. Y. v Apbii'eation November '16, 1951,8iial 1%; 256,757) 2Claims. c1. nap-116 This invention relates to aloop' shaper preparatoryto placing the" loop' on a folded hem of a parachute or other goodssurface requiring a loop for uni'form'aflixation thereto of a' retainingloop.

It is an object of the present invention to provide alloop sha'per onwhich a loop of strap material" can be made preparatory to the placingof the same upon the hem and in position for a stitching operation tosecure the loopto the hem. 4

It is another object of the invention to provide a'device on which aloop strap can-be applied to shape the loop and wherein by thesame'device the strap can be placed on the hem in the proper location and theside ends of the strap properly aligned to the desired angle asindicated by' the shape of the bottom plate and whereby'all loopswill-be applied in a uniform'manner and of uniform shape upon the hem ofa pa'rachuteor on a preselected surface portion of other goods requiringaflixation of retaining loops so that all loops are alike in size andare evenly distributed:

It is another object of the invention to provide aloop forming device onwhich the loop will be shaped and placed by means of the device upon thehem or object to be applied and wherein the device is so constructedthat an Opening int'liefoot of the sewing machine serves as a'guid'e'forapplying the device with the loop thereon" upon the hem orsurface. Theheel of the claw also serves to hold the loop in place andthe arms of the foothold the arms of the strap when the foot or claw ofthe sewing machine is brought down. The device is withdrawn or removedfrom the loop and arms of the strap prior to the beginning of thestitching operation as will hereinafter appear.

It is another object of the invention to provide on a loop forming andapplying device a centering guide memher which is adjustable relative tothe base plate part of the device and adapted to enter between the clawsor arms of the sewing machine foot so that the sewing machine foot actsas a guide when using this device to properly locate the loop upon thehem and for the beginning of the stitching operation and wherein theloop will be properly and automatically located on the hem in the properposition to receive the stitching needle when the device has been takenaway.

Other objects of the invention are to provide a loop forming devicehaving the above objects in mind, which is of simple construction,inexpensive to manufacture, has a minimum number of parts, adjustable,compact and eflicient in operation.

For a better understanding of the invention, reference may be had to thefollowing detailed description taken in connection with the accompanyingdrawings, in which:

Fig. 1 is a perspective view of the loop forming device embodying thefeatures of the present invention;

Fig. 2 is a collective and perspective view of the several parts of thedevice;

Fig. 3 is a longitudinal sectional view of the device taken on line 3-3of Fig. 1;

. 2 'Fig. 4is a'perspee'tive view of the strap from which the loopis'made;

Fig.- 5 is a-perspective' view of the device and of the strapb'eingapplied to the device;

Fig; 6 is a pers'pectiv'eview of the device and" of the hem ofapaiachuteorother device to which the loop'is'to be applied and with illustrationmade of the foot, or claw, of the sewing machine in place over the loopto hold" it while" tli'e device is" pulled rearwardly, whereby to permitthestitl'iing operation to be efiected upon thekstrapj Fig; 7 is atopplan view of the loop already stitched and applied tothehem of theparachute'or other device.

Referring now to the figures, 10 represents a base'mem; ber havingwingportions 11' and 12 with inclined edges 13 and 14 respectively.Extending forwardly from tlie wing portions" is atapered projection 15over which the st'rap'16' from which the loop is made is folded. Thisstrap 16* is'extended alon'gone edge of the one wing portion toa's'su'methe" angle thereof and is brought around, as shown in 5, toshape the loop and thereafter the other end ofthe' strap is broughtalong the inclined edge of the other wing portion,- in a manner as shownin Fig. 6'. The strap 16 hasinc'line'dend edges 17 and 18 which willextend parallel to hem 19"0f a parachute 20 or other surface of anyother device requiring retaining loops.

The rearend of the bottom plate 10' is bent upwardly at 21' to"provide ahandle in' which there is disposed at singlefin er' opening 22 that canbe used in the manner as illustrated in Fi 6.

Fixed to the bottom" plate" 10 by means of screws 23 and z risatransversely extendin block piece 25 having a large tliread'ed hor'zdand two" smaller threaded holes 27 and 28'ori"th""re'spective' oppositeends thereof.

A spring'fin r 32; exthds und'er the" blockpiece 25 and within a groove29 on the bottom thereof and is held a screw 31 within the large hole26. This spring fin'ger'32' extends outwardly'over the bottom plate andontothe'taperedportiori 15' at the'e'nd thereof. The screws 23 and 24respectively enter holes 27 and 28 to hold the block piece iii place'.Holes'3'4" and 33 are providedin the bottomplate to receive the screws23 and 24, Fig. 2; 7

Along angiepiece's's is rested over the block 25' and its vertical edgehas a recess 36 to permit the spring finger 32 to pass outwardlythereunder. This angle piece 35 carries an adjustable pointed guidemember 41 and has a transversely extending portion 42 with overlyingspaced horizontal portions 43 and 44 having respectively elongated slots45 and 46. Screws 47 and 48 respectively extend through the slots forconnection with the respective threaded holes 37 and 38 in the anglepiece 35.

Screws 51 and 52 having respectively washers 53 and 54, extenddownwardly respectively through elongated slots 39 and 40 of the anglepiece 35 and into holes 55 and 56 of the block piece 25.

It will thus be seen that longitudinal adjustment of the guide member 41along the finger spring 32 can be effected by loosening the screws 51and 52 and pulling the angle piece 35 forwardly or pushing itrearwardly. The guide member 41 can be adjusted laterally on the anglepiece 35 by loosening screws 47 and 48 and sliding the same along thetop face of the angle piece 35.

In operation, the strap 16 is Wrapped about the tapered end 15 of thebottom plate in a manner as shown in Figs. 5 and 6. The strap sides willbe brought into alignment with the inclined edges 13 and 14 of bottomplate 10, to be given the proper angle and to give the proper shape tothe loop which is being formed. The device with the strap thereon isthen placed on the hem 19, as shown in Fig. 6 beneath the sewing machineso that claw or foot 58 with separated claw portions angled apartreceives the pointed guide member 11. The opening in foot 58 may have adiflerent shape to accommodate reception of member 11 of difierentshape. Since the folded loop strap is temporarily retained by the finger32, the claw portions will lie outside both of the spring finger 32 andthe guide member 41 when the claw is brought down to bear directly onthe loop. By pulling the device outwardly while foot 58 is down on theloop which is aligned with the hem 19, the stitching operation can bestarted with needle 59. The initial stitching on loop 61 is indicated at64 Fig. 7, and will continue downwardly along the sides and ends of thestrap so as to fix the strap to the hem. The loop portion of the strapwhich has been formed is indicated at 61 in Fig. 7.

Since the claw 58 is set to receive the spring finger 32 and the pointedguide member 41, the strap will always be properly positioned relativeto the claw and in proper alignment with the needle 59. By being able toadjust the guide member 41 rearwardly and forwardly, the folded portionof the loop strap can be properly located beyond the edge of the hem,providing the rear of the claw is aligned with the hem edge. Byadjusting the guide member 51 laterally the proper starting point forthe needle on the strap can be found. It will be seen that once theadjustment is made of the device, the use of the same when applied tothe claw automatically properly locates the loop strap in place underthe claw. By an easy withdrawal of the device the loop is held andretained upon the hem by the claw until the sewing operation starts. Theclaw thus also functions to pull ofi the formed looped strap from thedevice.

It will thus be apparent that the loop strap can be easily formed uponthe device and then thereafter the device taken and put into the properlocation upon the hem whereby the sewing machine claw or foot can bebrought down over the looped strap to hold it so that the device canthereafter be pulled outwardly and leave the loop. The loops canaccordingly be made up quickly and also the stitching can be effectedwith accuracy and with the sides inclined at the proper angle so that auniform loop is made upon the hem each time.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within the spirit and scope ofthe appended claims.

What is claimed is:

1. A loop forming device on which loops can be formed prior to theplacing of the same in position on a hem, comprising a bottom platehaving wing portions and oppositely inclined edges and a tapered portionextending forwardly of the wing portions, a spring finger extendinglongitudinally of the plate and its end lying over the tapered portion,means for securing the spring finger to the bottom plate, said springfinger securing means including a transversely extending block piecesecured to the bottom plate, an angle piece connected to the bottompiece for transverse adjustment relative thereto, a pointed guide memberadapted for guiding engagement with a sewing machine claw and extendingoutwardly over the spring finger, said pointed guide member beingadjustably connected to the angle piece for longitudinal adjustmentthereof with respect to said angle piece, said angle piecebeingadjustably connected to the block piece for transverse adjustment alongthe bottom plate.

2. A loop forming device on which loops can be formed prior to theplacing of the same in position on a hem, comprising a bottom platehaving wing portions and oppositely inclined edges and a tapered portionextending forwardly of the wing portions, a spring finger extendinglongitudinally of the plate and its end lying over the tapered portion,means for securing the spring finger to the bottom plate, said springfinger securing means including a transversely extending block piecesecured to the bottom plate, an angle piece connected to the block piecefor transverse adjustment relative thereto, a pointed guide memberadapted for guiding engagement with a sewing machine claw and extendingoutwardly over the spring finger, said angle piece being adjustablyconnected to the block piece for longitudinal adjustment along thebottom plate and said pointed guide member being adjustably connected tothe angle piece, and said angle piece having longitudinally extendingparallel slots and screws extending through the slots and into the blockpiece and said pointed guide member having spaced horizontal portionswith longitudinal slots therein and screws extending into thelongitudinal slots and into the angle piece.

References Cited in the file of this patent UNITED STATES PATENTS533,792 Donovan Feb. 5, 1895 FOREIGN PATENTS 8,401 Australia July 25,1932

